Note 2 - Summary of Significant Accounting Policies - Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income (basic and diluted)	$ 1,340	$ 582	$ 3,448	$ 1,643
Weighted average shares outstanding (in shares)	37,916	37,816	37,879	37,816
Basic (in dollars per share)	$ 0.04	$ 0.02	$ 0.09	$ 0.04
Weighted average shares outstanding (including dilutive CSEs) (in shares)	38,375	38,064	38,355	38,052
Diluted (in dollars per share)	$ 0.03	$ 0.02	$ 0.09	$ 0.04